An overview of how humans hear
By: Lime Red Tetrahedron
Human hearing is the process by which vibrations in air are transduced (converted) into nerve impulses in the auditory nerve. This great biological feat is accomplished through the interaction of various subsystems in the ear. In this article, we will explore the process of hearing...
The human immune system
By: Dr. Bryan Katz
It is helpful to divide the immune system into three divisions: non-specific, innate, and adaptive. First, non-specific immune defenses include intact skin, body fluids with an acidic pH (esp. sweat, gastric juice, and urine), and complement proteins in the bloodstream. Many potentially infectious pathogens are...
Function of the spleen
By: Melody St. John
Almost all vertebrate animals have an internal body organ called the spleen. It is located in the left upper quadrant of the abdomen, and to the left of the stomach in humans. Anatomically, the spleen may vary in size and shape. But in healthy adult...
Overview of fluid accumulation in the body cavities
By: Tarek Musslimani
Edema is an accumulation of fluid in the body cavities and the skin such as the pleural cavity of the lungs in which it is called hydrothorax and pleural effusion. Also fluid can accumulate in the peritoneal cavity causing a condition which is called ascites...
Overview of pain sensation in humans
By: Tarek Musslimani
Pain is a sensation that everyone perceives after an injury has occured to the body. The type of pain that is usually perceived by people has its origin in an organic illness in the body. This is to distinguish it from pain that is perceived...
Overview of the human testes
By: Tarek Musslimani
The testes in humans are two round shape structures that are located within the scrotum. The scrotum provides protection for the testes against trauma. In addition, due to its presence outside the pelvic cavity, the testes are maintained within the scrotum at a lower temperature...
Basal metabolic rate explained
By: Lea Miller
If you’re lying on the couch watching television, do you still burn calories? The answer, of course, is yes. Even when you are not physically active, various systems in your body are still functioning to keep you alive. The most limited number of calories...
What blood does in the body
By: Vilie Farah
We all know how important blood is and the serious dangers associated to blood loss. Yet, few of us have clear understanding about the function of blood. Blood is a special type of tissue that is formed of cells and liquid plasma. It circulates through...
Facts about the human brain
By: J. James
In the movie The Wizard of Oz there is a character known as the Scarecrow who sings a song titled, If I Only Had a Brain. The beginning lyrics are: “I could while away the hours, conferring with the flowers, consulting with the rain...
Why breathing right is important for survival
By: Godwill Paul
Breathing is the first law of life. We can only last a few minutes without adequate intake of oxygen. To make this possible, nature has provided us with a breathing pipeline called the wind pipe or trachea which is naturally serviced and made clear by...

 

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